Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua viet » ca viet, hoa viet, cua vat
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
hanh lai » hanh lam, thanh lap, thanh loi
sach thu » sach thue, sach thieu, sach tham
thuc dan » thuc hanh, hoc dan, thuc vat
thu nang » thi nang, thu hang, thu bang
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu nang x hoi. hieu ve nham thuc dan ((hanh lai) or (((hanh tai) OR (hang tai)))) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang x hoi. hieu ve nham thuc dan ((hanh lai) OR (((hanh tai) OR (hang tai)))) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang x hoi. hieu ve nham thuc dan ((hanh lai) or (((hanh tai) OR (hang tai)))) cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang x hoi. hieu ve nham thuc dan ((hanh lai) or (((hanh tai) OR (hang tai)))) cua viet*.