Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dang hai » dang khai, hang hai, dung hai
nang mai » nang ma, nang tai, lang mai
danh hai » lanh hai, manh hai, danh hau
sach ly » sach y, sach lo, sach ty
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
tuc va » truc va, tuc xa, duc va
va lam » van lam, va lap

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 ly nang mai hoi. hieu va lam ((tuc va) or (thuc va)) ((danh hai) OR (dang hai)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang mai hoi. hieu va lam ((tuc va) OR (thuc va)) ((danh hai) OR (dang hai)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang mai hoi. hieu va lam ((tuc va) or (thuc va)) ((danh hai) OR (dang hai)) su triet*".