Perhaps you should try some spelling variations:
nam truoc » nam thuoc, lam truoc, nam truc
truoc va » truc va, thuoc va, truong va
hoc viet » hoc hien
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
tac ky » cac ky, tap ky, sac ky
va nam » van nam, ha nam, va nay
vi hoc » li hoc, va hoc

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) OR (tac ke)) lang xa hoi. hieu va nam truoc va hanh vi hoc viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((tac ky) OR (tac ke)) lang xa hoi. hieu va nam truoc va hanh vi hoc viet".
• Adding a wildcard symbol may retrieve word variants: thuat ((tac ky) OR (tac ke)) lang xa hoi. hieu va nam truoc va hanh vi hoc viet*.