Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
truoc va » truc va, thuoc va, truong va
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
va lam » van lam
va lap » va dap
bi hoa » boi hoa, ba 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 sac ky nang xa hoi. hieu ((va lam) OR (va lap)) truoc va hanh ((bi hoa) or (va hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang xa hoi. hieu ((va lam) OR (va lap)) truoc va hanh ((bi hoa) OR (va hoa)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky nang xa hoi. hieu ((va lam) OR (va lap)) truoc va hanh ((bi hoa) or (va hoa)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang xa hoi. hieu ((va lam) OR (va lap)) truoc va hanh ((bi hoa) or (va hoa)) viet*.