Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
thanh vai » thanh hai, thanh van, thanh tai
nham thuc » nhan thuc, nam thuc, nham thu
qua nham » qua nhat, qua cham, sua nham
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
co sach » bo sach, cuon sach, hoc sach
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((thu nang) or (thu hang)) ma hoi. hieu qua nham thuc vat thanh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((thu nang) OR (thu hang)) ma hoi. hieu qua nham thuc vat thanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((thu nang) or (thu hang)) ma hoi. hieu qua nham thuc vat thanh vai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: co sach ((thu nang) or (thu hang)) ma hoi. hieu qua nham thuc vat thanh vai ((cua te) OR (cua tu))*.