Perhaps you should try some spelling variations:
thuat tac » thuat tach, thuat tao, thuat tai
hieu van » hieu va, thien van, lieu va
truoc va » thuoc va, truong va, truoc bua
nang xa » nang x, lang xa, nang ma
van lam » van nam
truc va » thuc va, thuc vat, trung va
tac ky » tac ke, cac ky, tap ky
vi hoa » voi hoa, vi hoc, bi hoa
va hoa » van hoa, va hoc, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat tac ky nang xa hoi. hieu van lam ((truoc va) OR (truc va)) hanh ((vi hoa) or (va hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat tac ky nang xa hoi. hieu van lam ((truoc va) OR (truc va)) hanh ((vi hoa) OR (va hoa)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat tac ky nang xa hoi. hieu van lam ((truoc va) OR (truc va)) hanh ((vi hoa) or (va hoa)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat tac ky nang xa hoi. hieu van lam ((truoc va) OR (truc va)) hanh ((vi hoa) or (va hoa)) viet*.