Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu san » thuy san, thu ban, thuat san
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
nam luc » nang luc, nhan luc, nam thuc
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
phu san » phi san, thuy san
ca tra » cau tra, ca tru, va tra
di ca » di cau, di cua, doi ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu san) OR (phu san)) ky tang xa hoi. hieu van nam luc ((va danh) or (va hanh)) di ca tra~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu san) OR (phu san)) ky tang xa hoi. hieu van nam luc ((va danh) OR (va hanh)) di ca tra.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu san) OR (phu san)) ky tang xa hoi. hieu van nam luc ((va danh) or (va hanh)) di ca tra".
• Adding a wildcard symbol may retrieve word variants: ((thu san) OR (phu san)) ky tang xa hoi. hieu van nam luc ((va danh) or (va hanh)) di ca tra*.