Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
thuc van » thuc vat, thuc dan, thuc va
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
ve cham » va cham, ve chat, vu cham
tuc van » truc van, tuc va, duc van
xu bac » xa bac
bac ky » cac ky, ban ky, sac ky
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: xu bac ky tang mai hoi. hieu ((va cac) or (ve cham)) ((tuc van) OR (thuc van)) hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: xu bac ky tang mai hoi. hieu ((va cac) OR (ve cham)) ((tuc van) OR (thuc van)) hanh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "xu bac ky tang mai hoi. hieu ((va cac) or (ve cham)) ((tuc van) OR (thuc van)) hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: xu bac ky tang mai hoi. hieu ((va cac) or (ve cham)) ((tuc van) OR (thuc van)) hanh vi hoa viet*.