Perhaps you should try some spelling variations:
danh hai » dang hai, lanh hai, manh hai
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
lam tuc » lam thuoc, lam truoc, luat tuc
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
va lam » van lam, va lap
tuc va » thuc va, truc va, tuc xa
hai su » hai vu, lai su, hai so

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 y nang ((ma hoi) or (ma hoa)). hieu va lam tuc va danh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (ma hoa)). hieu va lam tuc va danh hai su triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (ma hoa)). hieu va lam tuc va danh hai su triet*.