Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thuy san » thuat san, thuy anh
thu san » thu ban, phu san, thuat san
nang ma » tang ma, sang ma, nang cao
vien da » vien dai, hien dai
va danh » va dinh, va dan, va hanh
sai cua » hai cua, lai cua, bai cua
ma hoi » mai hoi, xa hoi, ma hoa
da duc » dao duc, da duoc, do duc

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 (thuy san)) ky nang ma hoi. hieu vien da duc va danh ((sai cua) OR (dai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu san) OR (thuy san)) ky nang ma hoi. hieu vien da duc va danh ((sai cua) OR (dai cua)) tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu san) or (thuy san)) ky nang ma hoi. hieu vien da duc va danh ((sai cua) OR (dai cua)) tu*".